<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        /*自动查找页面所有标签，设置相同样式*/
        *{
            color:red;
        }
    </style>
</head>
<body>
    <p>吃饭</p>
    <p>睡觉</p>
    <div>div1  标签</div>
    <div>div2  标签</div>
    <strong>strong</strong>
</body>
</html>